Gaya APA
PFEIFFER, J, W.
(1974).
The 1974 Annual handbook for group facilitators
(
3rd ed.)
.
California:
UA publishers.
Gaya MLA
PFEIFFER, J., William.
"The 1974 Annual handbook for group facilitators".
3rd ed.
California:
UA publishers,
1974.
Buku.